@Gazella20: You might try opening the epub file in Sigil. A quick way to fix the spacing issue is to find and open the epub's CSS file and add the following code on a new line at the end of the file:

Code:

body, div, p, h1, h2, h3, h4 { margin: 0; padding: 0; }

Save the epub, and exit Sigil. You can then re-convert the epub to mobi in calibre and transfer the mobi to your Kindle, hopefully without all the gaps between paragraphs.

Quote:

Originally Posted by HarryT

The easy way is to check the "Remove blank lines between paragraphs" box in the conversion options. This may or may not work. If it doesn't, you need to find out what it is that's actually causing the issue (ie look at the book's source code) and then fix that.